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17 papers · 2 filters
Realizing Haldane Model in Fe-based Honeycomb Ferromagnetic Insulators
Heung-Sik Kim, Hae-Young Kee
The topological Haldane model (THM) on a honeycomb lattice is a prototype of systems hosting topological phases of matter without external fields. It is the simplest model exhibiti…
Interplay of non-symmorphic symmetry and spin-orbit coupling in hyperkagome spin liquids: Applications to NaIrO
Biao Huang, Yong Baek Kim, Yuan-Ming Lu
NaIrO provides a material platform to study three-dimensional quantum spin liquids in the geometrically frustrated hyperkagome lattice of Ir ions. In this work,…
Weyl nodes as topological defects of the Wannier-Stark ladder: From surface to bulk Fermi arcs
Kun Woo Kim, Woo-Ram Lee, Yong Baek Kim +1
A hallmark of Weyl semimetal is the existence of surface Fermi arcs connecting two surface-projected Weyl nodes with opposite chiralities. An intriguing question is what determines…
Disordered dimer state in electron-doped SrIrO
Tom Hogan, Rebecca Dally, Mary Upton +5
Spin excitations are explored in the electron-doped spin-orbit Mott insulator (SrLa)IrO. As this bilayer square lattice system is doped into the metallic…
High-temperature large-gap quantum anomalous Hall insulator in ultrathin double perovskite films
Santu Baidya, Umesh V. Waghmare, Arun Paramekanti +1
Motivated by the goal of realizing topological phases in thin films and heterostructures of correlated oxides, we propose here a quantum anomalous Hall insulator (QAHI) in ultrathi…
Phenomenological approach to hyperkagome spin liquid: gauge fields and spinons without slave particles
Yuan Wan, Yong Baek Kim
A number of experiments on the hyperkagome iridate, NaIrO, suggest existence of a gapless quantum spin liquid state at low temperature. Circumventing the slave particle…